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(No Model.) 2 SheetsSheet 1. A. F EARTH. SHIPS PROPELLER.

Patented May 12, 1885.

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(N0 Modl.) 2 Sheets-Sheet 2.

A. 1:". EARTH.

SHIPS PROPELLERF No. 317,488. Patented May 12, 1885.

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UNITED STATES PATENT OFFICE.

ALBIN FRANZ BAItTH, or enossnnnnrn, SAXONY, GERMANY- SHIPS PROPELLER.

SPECIFICATION forming part of Letters Patent P70311488 dated May 12, 1885. I

Application filed June 17, 188-1.

To all whom it may concern:

Be it known that I, ALBlN FRANZ BAR'III, of Grossenhain, Kingdom of Saxony, Germany, have invented a new and useful Improvement in Ships Propellers, of which the following is a specification.

My invention relates to a propeller adapted to act partly as an ordinary paddle-wheel and partly as a centrifugal pump, which draws in water from the side and throws it by centrifugal force toward the circumference of the casing which incloses the propeller, the water being at the same time carried round by the blades of the propeller and delivered at the bottom, like the water which leaves the paddles of an ordinary paddle-wheel.

In the accompanying drawings, Figure I is an axial section, and Fig. II a cross section of a propeller as applied to a flat-bottomed ship. Fig. III is an axial section, and Fig. IV a cross-section of a propeller as applied to a ship with deep draft. Figs. V to X illustrate modifications.

In the construction illustrated by Figs. I and II, a casing, g, open at the bottom, is formed in the lower part of the vessel and closed at the sides by partitions 0 0. These partitions have axial openings (1 cl, which lead to the suction-chambers e, situated at the sides of the casing g. The propeller inclosed in the casing 9 consists, chiefly, of a horizontal shaft, a, carrying blades 1), which reach below the bottom of the vessel. Each suction-chamber e is curved at the top to the same radius as the opening d, and diverges toward the bottom, where it has the same width as the opening of the casing g, as shown by dotted lines in Fig. II. To the open base of the easing 9 and suction-chambers 0 corresponds, therefore, a single opening in the bottom of the vessel, through which the three chambers are accessible.

The propeller may be placed in the center of the ships bottom, or in the front or back part of the vessel. Two propellers may be placed at the sides of the vessel. Instead of allowing the partitions c to extend downward as far as the blades of the paddle-wheel, it may cease at the bottom of the vessel, so that the paddle-wheel alone projects over the same.

In vessels of deep draft two propellers may be placed right and left of the keel, in the (No model.)

manner illustrated by Figs. III and IV. The wheels b maybe mounted on the same shaft 0/ which reaches across the center line of the ship, or on separate shafts. suction-chambers there is only one,e, situated at the outer side of the casing g and closed at the bottom, but admitting water at the top through the suction'pipe f, which may have a widened mouth in the hull of the ship.

A propeller of the same type as in Figs. I and II may be placed obliquely on each side of the vessel, as illustrated by Fig. V, which shows only one snctionchambcr e 5 but there may be two such chambers, as in Fig. I, one on each side of the casing 1 Fig. VI shows a propeller with horizontal axis, one suction-chamber e, and outer partition 0 extending down as far as the blades of the wheel, while the inner partition reaches as far as the ships bottom only.

Instead of two Fig. VII shows a pair of propellers for a flatbottomed vessel. Apair of wheels, b, inclosed in casings g, are mounted on the same shaft a, and have only one suction-chamber e situated between" the casings 9.

Instead of constructing a separate suctionchamber, water may be sucked into the cen ter of the casing 9 directly by openings d provided in the side of the ship 0 as shown by Figs. VII and IX, provided that the vessel has sufficient draft. In sailing-vessels my apparatus may be used as an auxiliary propeller. In this case the wheel has only three paddles, as illustrated by Fig. X, which, when the propeller is out of action, are placed inside the casing g so as not to offer any resistance to the progress of the vessel.

The casing and the suction-chambers may be composed in any convenient manner, which will readily suggest itself. For instance, each casing or chamber may be divided into an upper and a lower half, so that the bearings for the shaft are partly formed in the upper and partly in the lower half of the partition.

The lower part of thepartitions 0 may have any convenient shape, and the blades of the wheelsc may be rectangular, as in Fig. I, or they may be limited obliquely, as in Fig. III, or by a curve, as in Fig. VIII. The blades maybe completely flat, as in Fig. II, or curved, as in Fig. IV, or of any other convenient shape.

Any suitable number of propellers may be used in the same ship, and the mouth of the suction-chamber or opening may be provided with gridirons or wire netting to prevent the intrusion of plants and other solid bodies.

What I claim is 1. The combination of a paddle-wheel with a paddle-wheel chamber having a lateral opening for admitting water near the axis ofthe wheel, and allowing the lower part of the wheel to project so as to admitwater freely at the front and at the back of the lower pad dies, for the purpose of combining with the ordinary paddle-wheel action, the reaction resulting from the admission of water at the center and its discharge atthe rear of the wheel,substantially as described, is

ALBIN FRANZ EARTH. Witnesses:

FREDK. WILKIE, l\'lAX UNGER. 

